Anna Nicole Smith's ex-boyfriend LARRY BIRKHEAD has turned down an offer to pose nude for Playgirl magazine. Magazine bosses approached him in the hope he'd strip as a tribute to his late ex-girlfriend, who was one of Playboy's most popular Playmates - but the photographer has turned down the $100,000 (GBP50,000) offer. He tells In Touch Weekly magazine, "I'm too chicken to take my shirt off most of the time, much less my pants!"